that's a fascinating question.
i think the answer is actually no, which is a little disappointing.
nations don't unite through cuisine. communities do.
communities can spread to include nations, but nations don't always include the communities within their structures.
cuisine as cultural identity works mainly on more micro levels.
the more macro your perspective, the more difficult it is to relate to the self.
sure, we could say that we are represented through a global cuisine — we're human; we eat food; sometimes we cook it — but that sort of generalization loses the details and the characteristics that separates seafood from barbecue, philly cheese steaks from maryland blue crabs, south indian idlis from northern tikka sauces, and peruvian cuisine from polynesian.